Welding Safety Quiz

True or False 9. An oxyacetylene flame with feather is an oxidizing flame. (1 Point)

True or False 10. The oxygen hose is usually colored green and the acetylene hose is usually colored red. (1 Point)

True or False 11. When cutting steel with an oxyacetylene flame, the hot steel combines with oxygen and burns. (1 Point)

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-4

True or False 12. Oxygen cylinder valves (on the tank) should be closed tightly or opened all the way. (1 Point)

Acetylene cylinders contain:

• a. 250-275 pounds of pure acetylene gas.

• b. acetylene absorbed by ketone.

• c. acetone and as the gas is used more comes out of solution.

Acetylene gas is a compound of carbon and hydrogen, which is manufactured from calcium carbide. It is:

• a. a flammable gas that burns only when mixed with carbon dioxide.

• b. flammable only after it has been stored 90 days.

• c. a highly flammable gas and cannot be safely stored in hollow cylinders

• d. a gas that is stored in small cylinders at 2500 pounds pressure

The standard pressure of a full oxygen cylinder is:

• a. 2000 psi at 1000 F.

• b. 2200 psi at 700 F.

• c. 3000 psi at 70 0 F.

• d. 2500 psi at 0 0 F.

Welding or cutting metals, which contain one of the metals listed below, will produce toxic fumes, which, if you inhale them, will cause you to feel ill for several hours. Which metal is it?

• a. Nickel

• b. Copper

• c. Zinc

The exhaust system in a welding shop should be turned on:

• a. whenever welding fumes become spread to other parts of the shop

• b. before beginning to weld

• c. only if it affects the breathing of one of the students

Tags

NGSS.HS-ESS3-4

NGSS.HS-ETS1-3

NGSS.HS-LS2-7

What is the primary hazard associated with acetylene gas?

• a. It is highly corrosive.

• b. It is highly flammable.

• c. It is highly toxic.